Electrical apparatus for producing sound-signals.



G. H. OBRIEN.

4 ELECTRICAL APPARATUS FOR PRODUCING SOUND SIGNALS.

APPLICATION FILED DEC. 11, 1905..

Patented June 29, 1909,

311 cantor fia/rleafi O firaen/ attouwq I/Vi income: I

-unrrnio STATES! PATENT ()FFICE.

CHARLES H. QFRIEN, OF AUGUSTA, MAINE.

Specification of Letters Patent.

Patented June 29, 1909.

Application filed December 11, 1905. SerialNo. 291,233.

To all whom 'it may concern.-

'. Be it known that I, CHARLES H. OIBRIEN,

citizen of the United States, residing at Augusta, in the county of Kennebec and State of Maine, have invented certain new anduseful I m rovements in ElectricalA paratus for Pro ucing Sound-Signals, of wliich the following is a specification, reference being had therein to: the accompanying drawing.

My present ments in electrical apparatus for producing sound signals, the main object being the production of'sound signals for automobiles,

launches and the like where a greater sound is desired than with the apparatus as set forth in my Patent #974,245, patented July- The sound produced by the apparatus as set forth in the above named patent is round and clear, but with the construction as set forth in this application of electrodes in loose contact on armature which is centrally attached to diaphragm, I secure greater latitude of vibration consequently more intense sound and is a more especially desirable in autos, launches and electric cars. paratus consists primarily of anamplifier carrying a diaphragm, an elcctro-magnet adapted to operate an armature, which carries a circuit interrupter; the armature and the diaphragm being connected together so that vibrations of the armature are mechanically transmitted to the diaphragm. For this purpose I also intend to dispense with the use of the button as set forth in the above mentioned patent, preferring to shake the electrodes in loose contact to act in. combination with the prong of the armature.

In the accompanying drawings':Figure 1 is a sectional view of a sound producing body, the resonator showing one form of arranging the apparatus, the electrical circuit being in diagram. Fig. 2 is a similar view of a modified form.

Referring to the drawings,-the numeral 1 designates the amplifier which is connected to a casing 2 provided with aregroyable cap 3. Formed within the calsingis aninwardly projecting annular rim 4 to which is connected the diaphragm 5 preferably made of brass. Connected centrally ef the diaphragm and projectingfrom the opposite side from the amplifier is a prong or pinli which is con nected to the outer end of the pivotally.

mounted armature 6 whose other end is pivinvention relates to. improve This apotall connected to the plate 7 carried by the brac et 8, the said bracket being provided with a long arm 9 for supporting the electromagnet 10 and with a short arm 1.1 to which is connected 9. contact arm 12 whose upper end is adapted to contact the point 13 carried by the armature and opposed to one pole of the electro-magnet. As shown a' button 14 is secured to the wall of the casing and contains particles of carbon as. in my former. patent No. 794,295 and isused in the same manner as a variable resistance, wire 15 connecting thecontact arm and said button while the-wires 16 and 17 are connected to .thdposts 18 and 19 to the batteries 20 and ush button 21. By this construction it will e seen that upon establishin a circuit by means of the push button, the e ectro-magnct operatesor vibrates the armature, which in turn through the medium of the prong vibrates thediahprag'm and the'circuit 1nterrupter so as to produce a sustained or intense sound.

In Fig. 2, the electro-ma nets 26*, are carried by the arm 27, which as a tension up wardly, and by means of the screws 28, the electro-magnets are moved to or from the armature 28 From the foregoing description taken in connection with the drawings," it is evident that I )rovide a new and im roved construction 0 an apparatus of t is character in which a brass diaphragm is used in combination with a pivoted armature which is provided with a prong connected centrally of the dia hragm and to the armature so that all of t c pull and the vibration is centered into the center of the resonator and therefore free for action.

What I claim as new and desire. te secure by Letters Patent is:

1. In an apparatus of this character, the combination of a sound producing body, a diaphragm, a vibrating armature connected centrally of the. dia hragm, said armature being provided wit contacts, an electromagnet for vibrating the armature, an electrical source of energy, and means for adjusting the electro-magnet with relation to the armature.

2. In an apparatus ofthis character, the

for causing electricity to' flow from the source, and means for adjusting the. electromagnet with relationto the armature.

3. In an apparatus of this character, the combination of an electro-magnet, a sound producing vibrating body capablenof being" vibrated directly by'saidtelectro-magnet, an

armature capable of being vibrated by said a rated, an armature adaptedto be vibrated by -the electro-niagnet having one end connected to the centerof the sound producing body, contacts carriedby the armature, 'a source of electrical energy, means for causing electricity tofflow' from the source through the electro-magnets and contacts, and means for adjusting-the electro-magnet with relation-tothe armature;

5. In an ap aratus of this character,- a cas ing, an amp ifier carried thereby, a diaphragm mounted within the casing, an electroaiagaetniounted within the casing, an armature pivotallyinounted to be operated upon by the electro-magnet having one end connected to the diaphragm, a source of electrical energ ,means for causing the electricity to vibrate the armature, and a cap carriedby the casing, and means for adjusting the electro-magnet with relation to thc.

armature.

6. In an apparatus of this character, the combination 0]. acasing, an amplifier carried thereby, a diaphragm mounted within the casing, an electro-magnet mounted within the casing, an armature pivotally mounted to be operated upon by the electro-magnet and. having one end connected to the diaphragm, contacts adaptedto contact th'earma: ture as the same is being vibrated, a source of electrical energy, means for causing electricity to vibrate the armature, a capcarried by the casing, and means for adjusting the.

electro-magnet with relation to the armature.

testimony whereof I affix my signature lin presence of two Witnesses.

CHARLES H. o BRIE-N. Witnesses GERTRUDE E. DILL, F. N. BAI LEY. 

